Unit 2 Math Review

If you know that 4 x 5 = 20, which division fact do you know?

• 20 ÷ 4 = 5

• 5 ÷ 4 = 1.25

• 20 ÷ 5 = 4

• 25 ÷ 5 = 5

Which list contains only prime numbers?

• 12, 17, 24

• 14, 18, 22

• 13, 19, 23

• 16, 20, 25

Which of the following lists all the factors of 24?

• 1, 2, 3, 4, 6, 8, 12, 24

• 1, 2, 4, 6, 8, 10, 12, 24

• 1, 2, 3, 5, 6, 8, 12, 24

• 1, 2, 3, 4, 6, 9, 12, 24

What is the missing dimension for y?

• 8 ft

• 13 ft

• 16 ft

• 10 ft

Tags

CCSS.RI.4.1

CCSS.RI.4.3

CCSS.RI.4.7

Randy is planning a square patio. He wants to surround the patio with a decorative border.

How many feet of border will he need if each side of the patio is 7 feet long?

• 21

• 28

• 49

• 21

Which statement is true?

• The only factors of 7 are 7 and 1.

• The only factors of 9 are 9 and 1.

• The only factors of 10 are 10 and 1.

• The only factors of 12 are 12 and 1.

Tags

CCSS.RI.4.1

Which number sentence is part of the fact family for 8, 4, and 32?

• 32 ÷ 4 = 8

• 4 × 4 = 16

• 32 × 4 = 128

• 32 – 4 = 28

Which of the following lists all the factors of 30?

• 1, 2, 3, 5, 6, 10, 15, 30

• 1, 2, 3, 5, 10, 30

• 1, 3, 5, 6, 10, 15, 30

• 1, 2, 3, 5, 6, 15, 30

Janine is using wire to make triangles of different sizes. The triangles will be hung from the ceiling for her school’s annual abstract art day. How many inches of wire will she need to make a triangle with sides that are 12 inches long?

• 27

• 36

• 30

• 28

Tags

CCSS.RI.4.1

CCSS.RI.4.3

Which number is prime?

• 45

• 46

• 47

• 48